a. x=y=0
b.x=0;y=-1 hoac 1
y=0;x=-1 hoac 1
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cac ban oi giup minh voi
1.tim a,b thuoc Z,biet:a.(2b-3)=-6
2.cho x,y thuoc Z thoa man x mu 2 +y mu 2 chia het cho 3.chung to x va y chia het cho 3.
Tim cac so nguyen x,y biet:a)*x2 -3*x+1 chia het cho x+2 b)x2-xy = 5x-4y-9 c) (x2-8)*(x2-15)<0 d) (x+1)2+(y+1)2+(x-y)2=2 e) (x2-4)x2>0 ai lam truoc minh tick,mai minh di hoc rui,lam giup minh di pls Thank ban truoc ne ;(
1+2+3+......+x=y
giai giup mk nha moi nguoi !!!! neu ro cach lam bai
tim x thuoc Z biet:
|x-5|+x+3=16
|x-4|>x+2
||x+5|-4|=3
Cach lam nua nhe
minh chua biet cach lam,cac ban phaiviet cach lam vao minh moi tick
ko bat buoc lam tat ca cac cau
Tim x biet:
a, 25-y2=4(x-2016)2 (x , y thuoc Z)
b, \(2016^{\left|x^2-y\right|-8}\)\(+y^2-1=1\)
Trinh bay cach lam ho minh nhe
1.Cho x, y thuoc Z
Chung minh : 6x +11y chia het cho 31khi va chi khi: x+7y chia het cho 31
2.Cho x,y,z thuoc Z va x2 +y2=z2
Chung minh: xy chia het cho 12
Ai lam nhanh nhat minh se tich cho
Khong bat buoc lam het 2 cau
Cho x;y;z;t€Z
Chung minh (x-y)(x-z)(x-t)(y-z)(y-t)(z-t) chia het cho 12
Cach lam nua nhe
Tim x va y thuoc Z, biet:
xy - x + 2y = 3 ghi cach lam nua nhe!
Ai nhanh nhat; dung nhat like lun!!!!!!
tim x thuoc Z biet 13 - | x + 5 | = 13 lam giup minh nhe cam on